Add target hook CodeGen queries when generating builtin pow*.
Without fmath-errno, Clang currently generates calls to @llvm.pow.* intrinsics
when it sees pow*(). This may not be suitable for all targets (for
example le32/PNaCl), so the attached patch adds a target hook that CodeGen
queries. The target can state its preference for having or not having the
intrinsic generated. Non-PNaCl behavior remains unchanged;
PNaCl-specific test added.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@185568 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/TargetInfo.cpp b/lib/CodeGen/TargetInfo.cpp
index bef0d05..fa97357 100644
--- a/lib/CodeGen/TargetInfo.cpp
+++ b/lib/CodeGen/TargetInfo.cpp
@@ -443,6 +443,10 @@
public:
PNaClTargetCodeGenInfo(CodeGen::CodeGenTypes &CGT)
: TargetCodeGenInfo(new PNaClABIInfo(CGT)) {}
+
+ /// For PNaCl we don't want llvm.pow.* intrinsics to be emitted instead
+ /// of library function calls.
+ bool emitIntrinsicForPow() const { return false; }
};
void PNaClABIInfo::computeInfo(CGFunctionInfo &FI) const {